Calendar



(No Model.) 3 Sheet-Sheefi 1.

' W. K. DAVID.

CALENDAR.

No. 379,197. 7 Patented Mar. 6, 1888.

MAR. J U NE 35 4 G {if} Fz" 1, F 5 W IINESSESZ INVENIORQ '2' (No-Model.) 3 Sheets-Sheet 2 W. K. DAVID.

GALENDAR. No. 379,197. Patented Mar. 6, 1888.

W ITNEssEs: IN VENICE UNITED STATES PATENT Omen.

WILLIAM K. DAVID, OF CHICAGO, ILLINOIS.

CALENDAR.

SPECIFICATION forming part of Letters Patent No. 379,197, dated March 6, 1888.

Application filed June 25, 1886. Renewed December 10, 1887. Serial No. 257,529. (No model.)

To all 2071,0122, it may concern:

Be it known that I, WILLIAM K. DAVID, of Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Calendars, which improvement is fully set forth in the following specification and accompanying drawings, in which Figure 1 is a face view of my improved calendar; Fig. 2, a vertical central section of the same; Fig. 3, a face view of the central disk detached; Fig. 4,a face View of a modified form of the device, and Fig. 5 a vertical central sec tion of the modification shown in Fig. 4.

My invention relates to an improvement in calendars; and it consists in apairof diskspivoted centrally on a base-piece having at its upper part the names of the months arranged in particular order, while the lower part has the days of the months in numerical order from left to right, one of the said disks beingprovided with the number of years in a century, from 00 to 99, arranged spirally thereon in series of four each, and perforated so as to err pose the centurial years in both the Old and New Style, running from 00 to 1,700, inclusive, Old Style, and from 1,500 to 2,300, inclusive, New Style, the under disk also having the corresponding days of the week peripherally disposed, all of which will now be fully set forth in detail.

In the accompanying drawings, A represents a chart, of card-board or other suitable material, provided near its upper part with the names of the monthsincludcdin the fan-shaped space B. This fan shaped space B is separatedinto seven divisions by means of radial lines C. The first space,beginning at theleft, represents the month of May thesecond, August the third, February, March, and November; the fourth, June; the fifth, September andDeccmber; the sixth,April and July, and the last January and October. Ordinarily I prefer this disposition of them, for various reasons. The lower part of the said card A is provided with a second fan-shaped space, D, also having seven divisions by means of the radial lines E, the said fan-shaped space D, as well as the space B, being concentric with the central point, F, of the card, the lines 0 and E within these spaces being radial lines from this central point, F.

This space D has the numerical dates ofthe the pivotal point F, I provide a disk, G, as

shown in Fig. 3, having the names of the days of the week peripherally disposed thereon within spaces formed by radial lines H, corresponding in distance apart with the radial lines C and E within the spaces B and D. Inwardly some distance from the periphery the spaces between the radial lines H have the centurial years from 00 to 2,800, inclusive, disposed therein. These are arranged in two series, the Old Style ranging from 00 to 1,700, inclusive, while the New Style ranges from 1,500 to 2,300, inclusive. Outwardly from this disk G, as shown in Figs. 3 and 1, I provide an outer disk, I, having radial lines J, corresponding with the radial lines within the spaces B and D of the card A and the radial lines H of the disk G. The spaces between the radial lines J have the number of years in a century, from 0 to 99, disposed therein in a spiral form, commencing inwardly with 0 andincreasing to the left around the disk and ending with 99 near the periphery. Thus the outer numbers on the disk, commencing with 99, decrease from left to right. Just inwardly from these numbers of years, and beneath the 00, I provide a perforation, K, having at its side the words New Style, and inwardly concentric therewith the words Old Style, which corresponds with the arrangement of the two series of centurial years on the disk G.

Fig. 4 represents a modification of my device, wherein I use it as a watchcharm, forming it of metal, in two parts. The base or main part L is formed the same as is shown in Fig. 1 by the fan-shaped parts B and Dand the connecting central part beneath the disk G. These fan-shaped parts B and D have the names of the months and their dates arranged to correspond with Fig. 1; but the two disks G and I are formed in one piece, P,with the number of years in the century arranged from 00 to 99 and the names of the days of the week upon the face of a single disk, M, rotatable upon the central pivot, N. Thus the special feature of this form is its simplicity, and consists in a single disk upon the base-plate, thus forming an efficient and convenient calendar for any single century, which may be attached to the watch-chain. When used in this form,the entire device is made of metal, and is thus made 5 durable. On the reverse side can be placed any inscription or advertisement.

The operation of my device is as follows: Turn the disk I,having the apertureK therein,

until it reveals the desired centurial year in.

IQ either old or new series of the disk G. Both the disks G and I are then rotated in unison during the given century. By turning the year of the century beneath the given month the calendar for the given month is shown be- 15 low on the part D, while directly over them,

on the edge of disk above, are the correspondng days of the week. When the dates occur 1n January and February in leap-year, turn the dart that'points to the year under January 2:: and February as desired,'and the month appears below. In a centurial leap-year, turn the star 0 under January or February to adjust those months.

Having described my invention, what I claim 25 as new is'- 1. In a calendar, a chart provided with fanshaped spaces having separate divisions for the names of the months and for the dates in the month, and centrally two rotatable disks, one of them having the names of the days of 50 the week and the centurialyearsin two series, and the other being provided with figures from 00 to 99, so disposed as to be brought into proper conjunction with the inner disk, substantially as herein set forth. 3 5

2. In a calendar, a pair of disks pivoted centrally to card-board or metal, the upper one of them having numbers indicating the years of the century disposed spirally thereon in reverse order, and the under disk having the o days of the week peripherally disposed, and inwardly the centurial years in two series,substantially as herein set forth.

In testimony that I claim the foregoing I have hereunto set my hand, this 4th day of 5 May, 1886, in the presence of witnesses.

WM. K. DAVID. lVitnesses:

J. O. ROBISON, J r., C. D. ZERBE. 

